Orbach, Brennan as well as their colleagues acquired genital area from marine mammals which had died of natural causes: common and bottlenose dolphins, common porpoises and customary seals. They inflated the males’ penises with saline to determine the way they looked once they were erect, and compared all of them with the vaginal moulds. Additionally they required CT scans of penises placed in to the corresponding vaginas, to find out whether or not they built in easily and also the best positions.
That’s partially since it is challenging visualise vaginal structure. To beat this issue, Orbach has produced silicone moulds of cetaceans’ vaginas, revealing complex folds and spirals.
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Journal reference: Proceedings from the Royal Society B, DOI: 10.1098/rspb.2017.1265